si_pci.c

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    1 /*-
    2  * Device driver for Specialix range (SI/XIO) of serial line multiplexors.
    3  *
    4  * Copyright (C) 2000, Peter Wemm <peter@netplex.com.au>
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notices, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notices, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY ``AS IS'' AND ANY EXPRESS OR IMPLIED
   16  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
   17  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
   18  * NO EVENT SHALL THE AUTHORS BE LIABLE.
   19  */
   20 
   21 #include <sys/cdefs.h>
   22 __FBSDID("$FreeBSD: releng/8.3/sys/dev/si/si_pci.c 174136 2007-12-01 20:39:47Z peter $");
   23 
   24 #include <sys/param.h>
   25 #include <sys/systm.h>
   26 #include <sys/kernel.h>
   27 #include <sys/module.h>
   28 #include <sys/bus.h>
   29 #include <machine/bus.h>
   30 #include <sys/rman.h>
   31 #include <machine/resource.h>
   32 
   33 #include <dev/si/sireg.h>
   34 #include <dev/si/sivar.h>
   35 
   36 #include <dev/pci/pcireg.h>
   37 #include <dev/pci/pcivar.h>
   38 
   39 static int
   40 si_pci_probe(device_t dev)
   41 {
   42         const char *desc = NULL;
   43 
   44         switch (pci_get_devid(dev)) {
   45         case 0x400011cb:
   46                 desc = "Specialix SI/XIO PCI host card";
   47                 break;
   48         case 0x200011cb:
   49                 if (pci_read_config(dev, SIJETSSIDREG, 4) == 0x020011cb)
   50                         desc = "Specialix SX PCI host card";
   51                 break;
   52         }
   53         if (desc) {
   54                 device_set_desc(dev, desc);
   55                 return BUS_PROBE_DEFAULT;
   56         }
   57         return ENXIO;
   58 }
   59 
   60 static int
   61 si_pci_attach(device_t dev)
   62 {
   63         struct si_softc *sc;
   64         void *ih;
   65         int error;
   66 
   67         error = 0;
   68         ih = NULL;
   69         sc = device_get_softc(dev);
   70 
   71         switch (pci_get_devid(dev)) {
   72         case 0x400011cb:
   73                 sc->sc_type = SIPCI;
   74                 sc->sc_mem_rid = SIPCIBADR;
   75                 break;
   76         case 0x200011cb:
   77                 sc->sc_type = SIJETPCI;
   78                 sc->sc_mem_rid = SIJETBADR;
   79                 break;
   80         }
   81 
   82         sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
   83                                                 &sc->sc_mem_rid,
   84                                                 RF_ACTIVE);
   85         if (!sc->sc_mem_res) {
   86                 device_printf(dev, "couldn't map memory\n");
   87                 goto fail;
   88         }
   89         sc->sc_paddr = (caddr_t)rman_get_start(sc->sc_mem_res);
   90         sc->sc_maddr = rman_get_virtual(sc->sc_mem_res);
   91 
   92         sc->sc_irq_rid = 0;
   93         sc->sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ,
   94                                                 &sc->sc_irq_rid,
   95                                                 RF_ACTIVE | RF_SHAREABLE);
   96         if (!sc->sc_irq_res) {
   97                 device_printf(dev, "couldn't map interrupt\n");
   98                 goto fail;
   99         }
  100         sc->sc_irq = rman_get_start(sc->sc_irq_res);
  101         error = bus_setup_intr(dev, sc->sc_irq_res, INTR_TYPE_TTY,
  102                                NULL, si_intr, sc, &ih);
  103         if (error) {
  104                 device_printf(dev, "could not activate interrupt\n");
  105                 goto fail;
  106         }
  107 
  108         if (pci_get_devid(dev) == 0x200011cb) {
  109                 int rid;
  110                 struct resource *plx_res;
  111                 uint32_t *addr;
  112                 uint32_t oldvalue;
  113 
  114                 /* Perform a PLX control register fixup */
  115                 rid = PCIR_BAR(0);
  116                 plx_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
  117                     RF_ACTIVE);
  118                 if (plx_res == NULL) {
  119                         device_printf(dev, "couldn't map plx registers\n");
  120                 } else {
  121                         addr = rman_get_virtual(plx_res);
  122                         oldvalue = addr[0x50 / 4];
  123                         if (oldvalue != 0x18260000) {
  124                                 device_printf(dev, "PLX register 0x50: 0x%08x changed to 0x%08x\n", oldvalue, 0x18260000);
  125                                 addr[0x50 / 4] = 0x18260000;
  126                         }
  127                         bus_release_resource(dev, SYS_RES_MEMORY, rid, plx_res);
  128                 }
  129         }
  130 
  131         error = siattach(dev);
  132         if (error)
  133                 goto fail;
  134         return (0);             /* success */
  135 
  136 fail:
  137         if (error == 0)
  138                 error = ENXIO;
  139         if (sc->sc_irq_res) {
  140                 if (ih)
  141                         bus_teardown_intr(dev, sc->sc_irq_res, ih);
  142                 bus_release_resource(dev, SYS_RES_IRQ,
  143                                      sc->sc_irq_rid, sc->sc_irq_res);
  144                 sc->sc_irq_res = 0;
  145         }
  146         if (sc->sc_mem_res) {
  147                 bus_release_resource(dev, SYS_RES_MEMORY,
  148                                      sc->sc_mem_rid, sc->sc_mem_res);
  149                 sc->sc_mem_res = 0;
  150         }
  151         return (error);
  152 }
  153 
  154 static device_method_t si_pci_methods[] = {
  155         /* Device interface */
  156         DEVMETHOD(device_probe,         si_pci_probe),
  157         DEVMETHOD(device_attach,        si_pci_attach),
  158 
  159         { 0, 0 }
  160 };
  161 
  162 static driver_t si_pci_driver = {
  163         "si",
  164         si_pci_methods,
  165         sizeof(struct si_softc),
  166 };
  167 
  168 DRIVER_MODULE(si, pci, si_pci_driver, si_devclass, 0, 0);

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FreeBSD/Linux Kernel Cross Reference sys/dev/si/si_pci.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/si/si_pci.c